Pyrolysis of biomass, a renewable source, is noted to be an attractive process to produce biomass-derived fuels due to its economical and operational advantages. The operational advantages of the pyrolysis process are the requirement of no flue gas clean up, and the economic advantages of the pyrolysis process are based on the fact that many of the feedstock pre-treatment steps are not necessary when compared to other waste management processes. A clean fuel may be regarded as producing lower toxic emissions, such as sulfur, when compared to conventional fossil fuels . You can simulate catalytic reactions on ASPEN PLUS. all you need is two things : Reaction stoichiometry and the power law or LHHV Kinetics.

For detail following links and attached articles may useful.

https://www.mdpi.com/2673-3994/2/3/16/htm

https://www.hilarispublisher.com/conference-abstracts-files/2169-0022.S1.022_017.pdf

https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.mdpi.com%2F2073-4344%2F11%2F7%2F837%2Fhtm&psig=AOvVaw3t7AWbnipthTM94ISNmZIj&ust=1653717133882000&source=images&cd=vfe&ved=0CAwQjRxqFwoTCMC0nM3-_vcCFQAAAAAdAAAAABAP

https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.sciencedirect.com%2Fscience%2Farticle%2Fpii%2FS0196890422000395&psig=AOvVaw3t7AWbnipthTM94ISNmZIj&ust=1653717133882000&source=images&cd=vfe&ved=0CAwQjRxqFwoTCMC0nM3-_vcCFQAAAAAdAAAAABAZ

https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.frontiersin.org%2Farticles%2F10.3389%2Ffenrg.2020.594073%2Ffull&psig=AOvVaw3t7AWbnipthTM94ISNmZIj&ust=1653717133882000&source=images&cd=vfe&ved=0CAwQjRxqFwoTCMC0nM3-_vcCFQAAAAAdAAAAABAf

https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.sciencedirect.com%2Fscience%2Farticle%2Fpii%2FS1364032199000076&psig=AOvVaw3t7AWbnipthTM94ISNmZIj&ust=1653717133882000&source=images&cd=vfe&ved=0CAwQjRxqFwoTCMC0nM3-_vcCFQAAAAAdAAAAABAp

https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.sciencedirect.com%2Fscience%2Farticle%2Fpii%2FS1364032199000076&psig=AOvVaw3t7AWbnipthTM94ISNmZIj&ust=1653717133882000&source=images&cd=vfe&ved=0CAwQjRxqFwoTCMC0nM3-_vcCFQAAAAAdAAAAABBG

https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.sciencedirect.com%2Fscience%2Farticle%2Fpii%2FS0165237003000020&psig=AOvVaw3t7AWbnipthTM94ISNmZIj&ust=1653717133882000&source=images&cd=vfe&ved=0CAwQjRxqFwoTCMC0nM3-_vcCFQAAAAAdAAAAABBL

https://www.google.com/url?sa=i&url=https%3A%2F%2Flink.springer.com%2Farticle%2F10.1007%2Fs12649-020-01054-w&psig=AOvVaw3t7AWbnipthTM94ISNmZIj&ust=1653717133882000&source=images&cd=vfe&ved=0CAwQjRxqFwoTCMC0nM3-_vcCFQAAAAAdAAAAABBU

https://www.google.com/url?sa=i&url=https%3A%2F%2Flink.springer.com%2Farticle%2F10.1007%2Fs12649-020-01054-w&psig=AOvVaw3t7AWbnipthTM94ISNmZIj&ust=1653717133882000&source=images&cd=vfe&ved=0CAwQjRxqFwoTCMC0nM3-_vcCFQAAAAAdAAAAABBZ

https://www.google.com/url?sa=i&url=https%3A%2F%2Fbiotechnologyforbiofuels.biomedcentral.com%2Farticles%2F10.1186%2Fs13068-021-01977-z&psig=AOvVaw3t7AWbnipthTM94ISNmZIj&ust=1653717133882000&source=images&cd=vfe&ved=0CAwQjRxqFwoTCMC0nM3-_vcCFQAAAAAdAAAAABBk

https://www.google.com/url?sa=i&url=https%3A%2F%2Fbiotechnologyforbiofuels.biomedcentral.com%2Farticles%2F10.1186%2Fs13068-021-01977-z&psig=AOvVaw3t7AWbnipthTM94ISNmZIj&ust=1653717133882000&source=images&cd=vfe&ved=0CAwQjRxqFwoTCMC0nM3-_vcCFQAAAAAdAAAAABB0

https://core.ac.uk/download/pdf/162135889.pdf

https://www.researchgate.net/deref/https%3A%2F%2Fbooks.google.az%2Fbooks%3Fid%3DhbR-DwAAQBAJ%26pg%3DPA102%26lpg%3DPA102%26dq%3DHow%2Bcan%2Bi%2Bsimulate%2Ba%2Bcatalytic%2Breaction%2Bin%2Beither%2Baspen%2Bhysys%2Bor%2Baspen%2Bplus%2B%3F%26source%3Dbl%26ots%3D8zBdJcgNe2%26sig%3DACfU3U35PQPde70tMd4zrNiHoDyn0xezlQ%26hl%3Dru%26sa%3DX%26ved%3D2ahUKEwifkYCR8KLqAhXK0KQKHd8mAZAQ6AEwB3oECAoQAQ%23v%3Donepage%26q%3DHow%2520can%2520i%2520simulate%2520a%2520catalytic%2520reaction%2520in%2520either%2520aspen%2520hysys%2520or%2520aspen%2520plus%2520%253F%26f%3Dfalse

@Prem Baboo. Thanks. You've been of immense help to my work..

When you select the compounds, it is necessary to enter the desired catalyst. The desired catalyst may not be in the list of compounds. You must define it in the Hypothetical section

@Sara Modarresi-Motlagh, how will I simulate the interaction between the catalyst and other compounds..